User's Manual

C1n_Configuration_Manual_-_fm_1.0.0.x_for_US_&_Canada_20130116.doc

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Beacon Interval: Default setting is 100 ms. The C1n AP transmits beacons for each supported

BSS, with each BSS using the same beacon interval. The beacon interval is a value between 25

and 1000 ms. The following table showed is the best suggested interval worked with the current

operated APs. Note that it is not suggested to change the parameters in Advanced Radio Settings

unless you are experienced administrators.

Number of active

VAPs

Auto Beacon Interval

(ms)

100

200

300

400

Table 5 Beacon Interval Table

DTIM: Default setting is 1. The DTIM interval, also known as the data beacon rate, denotes the

frequency at which AP beacon will include a DTIM. This frequency is measured in the number

of beacon intervals, and is a value between 1 and 255.

Multicast Rate: This option allows Multicast packets to be sent in higher rates (up to the 54

Mbps) than commonly used (1 Mbps at IEEE 802.11b mode, 6 Mbps at IEEE 802.11g/a mode).

This is ALTAI's C1n proprietary feature thus it may be incompatible with the devices from other

vendors. Both C1n based devices the sender (Station) and the receiver (Access Point) must have

the same Multicast Rate configured in order to achieve better multicast packet throughput

performance

Short Preamble: Default setting is "Enabled". Short preamble usage is only available for

802.11b. If this option is set to "Enabled", both short and long preamble are used. Only long

preambles are used when Short Preamble is set to ‘Disabled’.

Protection Mode: Default setting is "None". C1n turns off CTS protection under protection

mode disabled. C1n will turns on CTS protection when Protection Mode is set to ‘always’. If

Protection Mode is set to "Auto", the C1n dynamically turns on and off CTS protection

depending on whether there are any 802.11b STAs associated/any traffic from associated

802.11b STAs.

Short Slot Time: Default setting is "disable". In 802.11g mode, if this feature is enabled, the

C1n advertises and uses 9 us slot times until the first client associates that cannot support 9 us.

Then, C1n advertises and uses 20 us slot times until all the stations that cannot support 9 us have

timed out. If it is disabled, the C1n only uses long slot times. In 802.11b mode only long slot

times are used.

QoS: Default setting is "Enabled". If QoS Mode is set to "Disabled", all traffic has equal priority

and equal chance of being delivered in a timely manner. When congestion occurs, all traffic has

an equal chance of being dropped. If QoS Mode is set to "Enabled", the QoS implementation is

based on WMM, which is a subset of the 802.11e draft. It prioritizes traffic between the

AP/Bridge and wireless client device/peer bridge device, on a per VAP basis. This control

enables QoS for 2.4GHz radios.